Search results

To '''bootstrap''' (the term can also be used as a noun) means to start a computer-related system from nothing. It has two main meanings: ...[operating system]]. Earlier methods for entering the bootstrap code into a blank memory, was special hardware for reading data off an external device ...

The '''H9270 backplane''' is a 4-slot [[QBUS#Backplanes|Q/Q]] [[QBUS]] [[backplane]], the standard backplane in the [[BA11-M mounting b ...[upgrading QBUS backplanes|upgrade it to Q22]]. A later variant, the H9270-Q, has [[jumper]]s which allow it to be configured for Q22 operation. ...

...It includes the [[40328]] QBUS backplane in an 8-slot [[QBUS#Backplanes|Q/Q]] configuration, and is wired via the [[printed circuit board|PCB]] for [[Q ...

...nnector contact identification|C and D connectors]] of a [[QBUS#Backplanes|Q/CD backplane]]. ...connections are used to connect together board pairs, without the need of a so-called '[[over the back]]' connector cable. ...

...SV11-Q/M/J Memory Comparisons]) mentions a "KTJ11-A", but it appears to be a typo; only the [[KTJ11-B]] is known. ...

'''MSV11''' refers to a number of different [[semiconductor]] [[main memory]] systems for [[QBUS]] * [[MSV11-Q QBUS memory|MSV11-Q]] ...

...ing box]] from [[Digital Equipment Corporation|DEC]] which is available in a caster-mounted single-[[cabinet]] form. It is the 'bigger brother' to the [ .../CD]] slots, the next 8 are [[QBUS#Backplanes|Q/Q]]; the final slot is for a signal distribution board, for the connection of [[mass storage]] [[periphe ...

...edge connector contact identification|edge connector pins]]), denominated 'A'-'D'. ...(pairs of 'connectors') of each quad slot are fully wired for QBUS, and so a single slot can hold two separate dual-width QBUS [[peripheral controller|d ...

...ds are available both from [[Digital Equipment Corporation|DEC]], and from a few outside vendors who produced and sold PMI [[main memory]] cards. ...[QBUS]] memories, except that they cannot be used in a [[QBUS#Backplanes|Q/Q backplane]]. ...

...BUS]] to [[Ethernet]] [[Local Area Network]] [[network interface]]. It was a [[DEC card form factor|dual]] card, the M7516. * [[Digital ETHERNET Q-Bus Network Adapter]], DEQNA, the DELQA's predecessor ...

...lane]], which could hold [[DEC card form factor|quad-sized]] cards. It was a [[QBUS#Variable_address_size|Q22]] backplane (the only significant differen ...problem with this seems to have been the [[MMV11-A QBUS core memory|MMV11-A]].) ...

The '''H9273 backplane''' is a 9-slot [[QBUS#Backplanes|Q/CD]] [[QBUS]] [[backplane]], the standard backplane in the [[BA11-N mountin It was a [[QBUS#Variable_address_size|Q18]] backplane, but it is relatively easy to ...

...ation|DEC]]'s first [[QBUS]] to [[Ethernet]] [[network interface]]. It was a [[DEC card form factor|dual]] card, the M7504. ...early [[DEUNA]] takes two hex cards to hold the equivalent functionality), a number of complex [[integrated circuit|chips]] are used: ...

...ad-height cards. It includes an eight-slot quad height [[QBUS#Backplanes|Q/Q]] backplane. Original backplanes appear to be [[QBUS#Variable address size| A small [[PDP-11/03]] style [[front panel]] is provided, with typical RUN/HAL ...

'''SQUOZE''' is a space-minimizing character set as used by [[Incompatible Timesharing System | A ...

[[Image:MMV11-A.jpg|350px|thumb|right|MMV11-A board set, showing only the G653 mother-board]] '''MMV11-A''' is a [[core memory|core]] [[main memory]] module for the [[QBUS]] - the only cor ...

...ds are available both from [[Digital Equipment Corporation|DEC]], and from a large number of outside vendors who produced and sold [[QBUS]] [[main memor Note that although Q18 memory cards can be plugged into a Q22 machine (e.g. most [[PDP-11/23]]'s, and all [[PDP-11/73|-11/73]]'s), an ...

...]] (BDAL18-BDAL21, respectively) on all '''''QBUS''''' slots together into a bus. So, one wires BC1 on slot 1 to BC1 on slot 2, slot 3, etc, etc. ...n't run the extra BDAL lines to the C/D connectors, but rather only on the A-B connectors wired for QBUS (which run down the left-hand side, when facing ...

...ith "'''?'''" for confirmation if changes not written to disk; another "'''q'''" = leave unconditional * '''Q''' = Leave editor unconditional, discarding edits ...

...5A of +12V); and an [[H9270 backplane|H9270-A]] 4-slot [[QBUS#Backplanes|Q/Q]] [[backplane]], which could hold [[DEC card form factor|quad-sized]] cards ...was only [[QBUS#Variable_address_size|Q16]] capable, making the Q18 H9270-A backplane somewhat excessive. Later on it was used for the Q18/Q22 [[PDP-11 ...